YAHYA PARTOMUAN HARAHAP : The Oil Palm Frond Fermented by Aspergillus niger on The Digestibility of Dry Matter and Organic Matter on Bali cattle (Bos sondaicus). Under supervised by EDHY MIRWANDHONO and MA’RUF TAFSIN.
The Oil Palm Frond is potensive to be an alternative feed. But the high of fiber in the oil palm frond has a negative effect to the digestibility. Utilizing of Aspergillus niger can increase the nutrition of oil palm frond. The objective of this research was conducted to investigate the effects of utilizing of the stem and midrib of palm fermentation by Aspergillus niger as feed of concentrate on the digestibility of dry and organic matter of Bos sondaicus. The design used in this research was the completely group design (CGD) with three treatments and three groups. The treatment were R0 (without concentrate), R1 (15% the stem and midrib of palm fermentation on concentrate) and R2 (30% the stem and midrib of palm fermentation on concentrate) and the average groups of gain were K1 = 13.76 kg, K2 = 14.87 kg and K3 = 15.55 kg.
The result of this research showed that the utilizing of the stem and midrib of palm fermentation by Aspergillus niger of 30% and 15% in concentrate can produce the highest of the dry and organic matter consumption, the digestibility of dry and organic matter of Bos sondaicus was 4.96 ± 0.19 kg/c/d, 4.46 ± 0.17 kg/c/d, 74.27 ± 1.13% and 73.06 ± 1.11%. It could be concluded that the utilizing of the stem and midrib of palm fermentation by Aspergillus niger in concentrate can extend the positive effect on the digestibility of cattle (Bos sondaicus).